US 11,876,507 B2
Acoustic wave resonator with interdigital transducer electrode aperture for filter steepness
Tomoya Komatsu, Irvine, CA (US); Yiliu Wang, Irvine, CA (US); Akira Ochiai, Suita (JP); and Joshua James Caron, Madison, NC (US)
Assigned to Skyworks Solutions, Inc., Irvine, CA (US)
Filed by Skyworks Solutions, Inc., Irvine, CA (US)
Filed on Dec. 17, 2020, as Appl. No. 17/124,862.
Application 17/124,862 is a continuation of application No. 16/900,175, filed on Jun. 12, 2020, granted, now 11,451,212.
Claims priority of provisional application 62/863,688, filed on Jun. 19, 2019.
Claims priority of provisional application 62/863,733, filed on Jun. 19, 2019.
Prior Publication US 2021/0105004 A1, Apr. 8, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H03H 9/64 (2006.01); H03H 9/25 (2006.01); H03H 9/72 (2006.01); H03H 9/02 (2006.01)
CPC H03H 9/6483 (2013.01) [H03H 9/02834 (2013.01); H03H 9/25 (2013.01); H03H 9/6406 (2013.01); H03H 9/725 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An acoustic wave filter with a transverse spurious mode for improving skirt steepness, the acoustic wave filter comprising:
a plurality of series acoustic wave resonators including at least a first acoustic wave resonator that includes an interdigital transducer electrode and configured to generate an acoustic wave having a wavelength of λ, the interdigital transducer electrode having a first aperture of less than 10λ to concentrate a transverse spurious mode above a resonate frequency, and the transverse spurious mode of the first acoustic wave resonator configured to improve steepness of a skirt of the acoustic wave filter; and
a plurality of shunt acoustic wave resonators including at least a second acoustic wave resonator with a lower resonate frequency than the first acoustic wave resonator.